Occupy Wall Street turns one. The protest against economic equality, which began on Sept. 17, 2011, in Manhattan's Zuccotti Park, quickly caught fire and led to "Occupy"-themed protests across the country - and in other countries.

Happy Constitution Day! Every September 17, since 1787, Constitution Day has commemorated the signing of the U.S. Constitution.

Watch this classic "School House Rock" video explain the preamble:

Think fast: Do you know which Constitutional amendment allows Occupy Wall Street and other peaceable assemblies to go on?

Tuesday, Sept. 18

Fun facts: The building took almost 100 years to complete - several architects came and went, the British set fire to it and it was called into use during the Civil War - but now it's one of the most visited buildings in the United States, seeing around three million visitors each year.

And today is the start of the two-day trip for Space Shuttle Endeavor to its new home in California. Today it'll fly over various areas of the "Space Coast," including the Kennedy Space Center Visitor Complex and Cape Canaveral Air Force Station, and stop overnight in Texas. Tomorrow it'll be ferried to California. Watch Twitter for sightings: #spottheshuttle.

Thursday, Sept. 20

On this day in 1973, a highly-publicized tennis match - dubbed the "Battle of the Sexes" - was played between Billie Jean King and Bobby Riggs. Riggs, known for his chauvinistic views towards women, had boasted before the match that King - and women in general - were inferior. King ended up beating him, 6-4, 6-3, 6-3, in what became known as a historic victory for women's rights.

Friday, Sept. 21

Today is the premiere of "End of Watch," starring Jake Gyllenhaal. The movie follows two young LAPD officers who confiscate a small amount of money and guns from a notorious drug cartel during a routine traffic stop -- and become the targets themselves.

Watch the trailer:

"Trouble With the Curve," Clint Eastwood's latest movie also comes out today. It's about an old baseball recruiter taking his daughter along for his final recruit. Will he end up recruiting a chair? Guess we'll have to wait and see.

Watch the trailer:

Saturday, Sept. 22

The Social Good Summit in New York starts on Saturday and goes through Monday. The three-day conference, sponsored by the United Nations, the Bill and Melinda Gates Foundation and Mashable, will feature big ideas about the intersection of technology and social good: